F5 BIG-IP 12.1.0/12.1.1/12.1.2/13.0.0 TMM Request input validation

CVSS Meta Temp Score
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CTI Interest Score
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A vulnerability was found in F5 BIG-IP 12.1.0/12.1.1/12.1.2/13.0.0 (Firewall Software). It has been declared as problematic. This vulnerability affects an unknown functionality of the component TMM. The manipulation as part of a Request leads to a input validation vulnerability. The CWE definition for the vulnerability is CWE-20. The product receives input or data, but it does not validate or incorrectly validates that the input has the properties that are required to process the data safely and correctly. As an impact it is known to affect availability. CVE summarizes:

In F5 BIG-IP LTM, AAM, AFM, Analytics, APM, ASM, DNS, GTM, Link Controller, PEM and WebSafe software version 13.0.0 and 12.1.0 - 12.1.2, malicious requests made to virtual servers with an HTTP profile can cause the TMM to restart. The issue is exposed with BIG-IP APM profiles, regardless of settings. The issue is also exposed with the non-default "normalize URI" configuration options used in iRules and/or BIG-IP LTM policies.

The bug was discovered 12/21/2017. The weakness was released 12/21/2017 (Website). The advisory is available at support.f5.com. This vulnerability was named CVE-2017-6138 since 02/21/2017. The attack can be initiated remotely. No form of authentication is required for a successful exploitation. The technical details are unknown and an exploit is not available.

The vulnerability scanner Nessus provides a plugin with the ID 118604 (F5 Networks BIG-IP : TMM vulnerability (K34514540)), which helps to determine the existence of the flaw in a target environment. It is assigned to the family F5 Networks Local Security Checks and running in the context l.

Proper firewalling of is able to address this issue. A possible mitigation has been published before and not just after the disclosure of the vulnerability.

The vulnerability is also documented in the vulnerability database at Tenable (118604). Entries connected to this vulnerability are available at 110990, 110989, 110988 and 110984.







CPE 2.3info

CPE 2.2info


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VulDB Meta Base Score: 6.4
VulDB Meta Temp Score: 6.3

VulDB Base Score: 5.3
VulDB Temp Score: 5.2
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NVD Base Score: 7.5
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Class: Input validation
ATT&CK: Unknown

Local: No
Remote: Yes

Availability: 🔍
Status: Not defined

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Nessus ID: 118604
Nessus Name: F5 Networks BIG-IP : TMM vulnerability (K34514540)
Nessus File: 🔍
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Threat Intelligenceinfo

Interest: 🔍
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Recommended: Firewall
Status: 🔍

0-Day Time: 🔍


02/21/2017 🔍
12/20/2017 +302 days 🔍
12/21/2017 +1 days 🔍
12/21/2017 +0 days 🔍
12/21/2017 +0 days 🔍
12/22/2017 +1 days 🔍
11/02/2018 +315 days 🔍
01/18/2023 +1538 days 🔍


Vendor: f5.com

Advisory: K34514540
Status: Not defined
Confirmation: 🔍

CVE: CVE-2017-6138 (🔍)
SecurityTracker: 1040051

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Created: 12/22/2017 08:21 AM
Updated: 01/18/2023 05:57 PM
Changes: 12/22/2017 08:21 AM (62), 12/28/2019 10:56 AM (7), 01/27/2021 06:17 PM (3), 01/18/2023 05:57 PM (3)
Complete: 🔍


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